#include <bits/stdc++.h>
using namespace std;
using uint=unsigned int;
using ll=long long;
using ull=unsigned long long;
using i128=__int128;
const int N=1e6+5;

void solve(){
    int n;
    cin>>n;
    vector<int> arr(n);
    for(int i=0;i<n;i++){
        arr[i]=i+1;
    }
    for(int i=n-1;i>=0;i--)cout<<arr[i]<<" ";
    for(int i=0;i<n;i++){
        if(i==n-1)cout<<arr[i];
        else cout<<arr[i]<<" ";
    }
    return;
}

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    solve();
    

    return 0;
}